What is something that most people don't know?

1. When people lie, they look you in the eye instead of looking away.

2. Real smiles involve blinking while fake ones usually lack blinks.

3. Joy lasts 35 hours, while sadness lasts 120 hours.

4. Speeding up speech usually shows you're feeling nervous.

5. Looking up and left means creative thinking, while up and right indicates recalling.

6. Liars hate silence in conversation and tend to throw unnecessary details.

7. Only humans, chimps, and dolphins hold their heads up to look more in charge.

8. "Moment" used to be a unit of time, and there were 40 "moments" in an hour.

9. Doing things that scare you will make you happier.